Is there a xterm equivalent that is optimized for use over VNC?

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http://unix.stackexchange.com – tl;dr Is there a terminal emulator that uses rectangular copies for scrolling? I'm doing a lot over work over the internet just now (hacking a program on my employer's cluster that can't be installed on my laptop), and that has caused some changes in my workflow. Getting a ssh tunnel with X support through the firewall to the cluster is no problem, then I have a choice. Open a couple of remote xterms and emacs and go to work directly This is simple, but I lose all my working state anytime I disconnect from the network. Having a hairtrigger C-x C-s reflex means that I don't lose any ed (HowTos)